Begg矫治器带环颊面管的内径为（）。
A.65mm
B.72mm
C.84mm
D.87mm
E.0.91mm
参考答案：E
In 1942，Columbus_______ on the of the Bahama islands, but he mistook it for an island off India.
A．lands
B．landed
C．has landed
D．had landed
小青龙汤中，具有温肺化饮，兼助麻桂解表的药对是
A．麻黄、芍药B．麻黄、桂枝C．五味子、芍药D．半夏、甘草E．干姜、细辛
